Autonomous Driving Brake Mode Switching for Accurate Deceleration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing braking control methods for vehicles with multiple braking devices are inaccurate due to reliance on expensive sensors and complex calculations, and they struggle to account for variables like road gradient and vehicle weight, leading to inefficiencies in achieving desired acceleration.
Innovation Solution
A vehicle control apparatus that includes a first and second braking device, a sensor device, and a control device to determine an operating mode based on acceleration error, accumulation values, and real-time driving conditions, allowing for efficient distribution of braking torque between the devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive sensors and large amounts of calculation results are used to increase vehicle model accuracy, then the accuracy of following required acceleration is improved, but the cost and computational complexity increase
Solution Approach 1:
The patent extracts only the essential parameters needed for braking control (acceleration error and accumulation value) from the complex vehicle model, eliminating the need for expensive sensors and extensive calculations while maintaining control accuracy
Solution Approach 2:
The patent uses readily available sensor data (acceleration from existing sensors) instead of expensive specialized sensors, and employs simple calculation methods that require minimal computational resources
2Ease of operation
If predictive values are used for variables like road gradient and vehicle weight due to controller performance limits, then the system can operate within hardware constraints, but the accuracy of following required acceleration decreases
Solution Approach 1:
The patent implements feedback by continuously monitoring acceleration error and its accumulation value, using this feedback to dynamically adjust braking torque distribution between main and auxiliary braking devices, thereby achieving accurate control without needing predictive values for road gradient and vehicle weight
Solution Approach 2:
The system uses its own operational data (acceleration error and accumulation value) to self-adjust braking control, eliminating the need for external predictive information about road conditions and vehicle parameters
3Duration of action of stationary object
If braking torque is preferentially distributed to the auxiliary braking device, then the main braking device wear is reduced, but the accuracy of achieving required acceleration may be compromised
Solution Approach 1:
The patent dynamically adjusts the distribution of braking torque between main and auxiliary braking devices based on real-time acceleration error and accumulation value, allowing the system to flexibly switch between braking devices to maintain accuracy while managing wear
Solution Approach 2:
The patent changes the operating parameters of braking devices by adjusting torque distribution ratios based on accumulated error, optimizing both service life and control accuracy through parameter variation
Data Source
AI summary
An apparatus for a vehicle to manage different braking modes is introduced. The apparatus may use a control device, along with sensors and memory, to monitor acceleration error and a real-time driving mode. Based on information about the acceleration error and the real-time driving mode and predefined reference values, the control device may switch between driving mode, auxiliary braking mode, simultaneous braking mode, or main braking reduction mode. This may enable the vehicle to optimize braking based on real-time conditions.